Manifest for Android Mainline 12.0.0 Release 30 (7846176,com.google.android.media.swcodec)

Change-Id: I8402b3dc44f8af6d04e58a5a35f5769ded1063e7

default.xml

@@ -4,13 +4,10 @@
   <remote  name="aosp"
            fetch=".."
            review="https://android-review.googlesource.com/" />
-  <default revision="refs/tags/android-mainline-12.0.0_r57"
+  <default revision="refs/tags/android-mainline-12.0.0_r30"
            remote="aosp"
            sync-j="4" />
 
-  <superproject name="platform/superproject" remote="aosp" revision="android-mainline-12.0.0_r57" />
-  <contactinfo bugurl="go/repo-bug" />
-
   <project path="build/make" name="platform/build" groups="pdk" >
     <copyfile src="core/root.mk" dest="Makefile" />
     <linkfile src="CleanSpec.mk" dest="build/CleanSpec.mk" />